Unit 706: Animal Breeding and Genetics

1. Introduction to Animal Breeding and Genetics

• Definition and scope of animal breeding
• Role and significance in agriculture and animal production
• Historical development and milestones

2. Mendelian Genetics and Inheritance

• Basic principles of Mendelian genetics
• Law of segregation and independent assortment
• Punnett squares: predicting genotype and phenotype ratios
• Genotype vs. phenotype: definitions and examples
• Common inheritance patterns: dominant, recessive, incomplete dominance, codominance

3. Genotype and Phenotype Analysis

• Relationship between genotype and phenotype
• Influence of dominant and recessive alleles
• Examples of trait expression in animals
• Environmental impacts on phenotype

4. Genetic Variation and Diversity

• Sources of genetic variation: mutation, recombination, gene flow
• Importance of genetic diversity in populations
• Consequences of reduced diversity: inbreeding depression and genetic drift
• Methods to assess and maintain diversity

5. Selective Breeding and Hybridization

• Principles of selective breeding
• Criteria for selecting breeding stock
• Hybridization: definition and examples
• Benefits and limitations of hybrid vigor (heterosis)

6. Quantitative Genetics

• Introduction to quantitative traits
• Heritability: concept and estimation
• Genetic correlations between traits
• Breeding values and their use in selection decisions

7. Genomic Selection and Marker-Assisted Breeding

• Overview of genomic technologies in animal breeding
• Marker-assisted selection (MAS): principles and applications
• Genomic prediction and genomic estimated breeding values (GEBVs)
• Advantages over traditional selection methods

8. Breeding Strategies and Programs

• Inbreeding vs. outbreeding: definitions, advantages, and risks
• Line breeding and pedigree management
• Crossbreeding systems and their genetic impacts
• Designing breeding programs for genetic improvement

9. Ethical and Welfare Considerations in Animal Breeding

• Ethical issues in selective breeding and genetic modification
• Animal welfare implications of breeding for specific traits
• Regulations and guidelines governing animal breeding practices

10. Future Trends in Animal Breeding and Genetics

• Emerging technologies: gene editing, CRISPR-Cas9
• Potential impacts on livestock production and sustainability
• Challenges and opportunities in modern animal breeding
• Integration of precision breeding with global food security goals